merge: Add documentation using Docusaurus (#97)

This pull request implements the new OpenDC documentation website using Docusaurus 2.

## Implementation Notes :hammer_and_pick:

* Add initial Docusaurus website.
* Migrate existing docs to Docusaurus.
* Configure Prettier for Docusaurus.
* Add tutorials to OpenDC website (#28)
* Add deployment workflow via GitHub actions

## External Dependencies :four_leaf_clover:

* Docusaurus 2

Closes #28

1 files changed, 30 insertions, 0 deletions

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+# OpenDC docs site
+
+This directory contains the sources for the [OpenDC website](https://opendc.org). The website is built 
+using [Docusaurus 2](https://docusaurus.io/), a modern static website generator.
+
+### Installation
+
+```
+$ npm i
+```
+
+### Local Development
+
+```
+$ npm run start
+```
+
+This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
+
+### Build
+
+```
+$ npm run build
+```
+
+This command generates static content into the `build` directory and can be served using any static contents hosting service.
+
+### Deployment
+
+The site is automatically deployed using GitHub Actions.